House of Reginar

House of Reginar

Armorial of Reginar
Country Duchy of Lower Lorraine, Duchy of Brabant
Founded 770
Founder Gilbert, 1st Count of the Maasgau
Final ruler Joanna, Duchess of Brabant
Cadet branches House of Montfort
House of Percy (until 1610)
House of Hesse
House of Brabant-Aiseau

The House of Reginar (later known as the House of Brabant) was a kin-group in Lotharingia during the Carolingian and Ottonian centuries. They were the first dynasty of the County of Hainault and they supplied two Dukes of Lorraine and the Landgraves and later Dukes of Brabant, Dukes of Lothier and Dukes of Limburg. The main branch extinguished in 1355, leaving its duchies to the House of Luxembourg which in turn left them to the House of Valois-Burgundy in 1383. A side branch is the House of Hesse which ruled Hesse from 1264 until 1918 and is still existing today.


Their eldest ancestor is Gilbert, Count of the Maasgau (mentioned in 841) who served King Lothair I, but defected to Lothair's half-brother Charles the Bald during the civil war of 840–843. In 846 Gilbert abducted an unnamed daughter of Lothair and married her in an attempt to force Lothair to reinstate him. Gilbert's son is believed to be Reginar, Duke of Lorraine (c. 850–916). Following the death of Charles the Fat, the Reginarids began a long fight with the Conradines for supremacy in Lotharingia.[1] When they triumphed, in 910, it was in electing Charles the Simple as king. It was the combined forces of Bruno I of Lorraine and the Carolingians of West Francia that finally broke the Reginarids' hold on power.[2] In 958, Reginar III had his lands confiscated and redistributed to Gerard, Count of Metz, of the Matfridings, enemies of his family since the reign of Zwentibold.[3]

The Reginarids supported Lothair of France against Otto II, but they made a deal with the latter in 978.[4] Nonetheless, the Reginarids were not longer a unified family by the end of the tenth century.[5] Their descendants in Mons and Louvain continued their spirit of opposition to the king, however.[6] The house also produced a queen-consort of England in the form of Adeliza of Leuven, who married Henry I of England.


Dukes of Lorraine

Coat of Arms of Hainaut

Counts of Hainaut

Counts of Leuven, Counts of Brussels

Dukes of Lower Lorraine

Passes to Henry I, Duke of Brabant (1190–1235), see below: Duke of Brabant

Counts of Leuven, Counts of Brussels and Landgraves of Brabant:

Counts of Leuven, Counts of Brussels, Landgraves of Brabant, Margrave of Antwerp and Dukes of Lower-Lorraine:

Dukes of Brabant and Dukes of Lothier:

Coat of arms of the Dukes of Brabant and Limburg

Dukes of Brabant, Dukes of Lothier and Dukes of Limburg:



  1. Reuter, 135.
  2. Reuter, 168.
  3. Reuter, 159.
  4. Reuter, 176.
  5. Reuter, 192.
  6. Reuter, 201.
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